Butch Davis wrote:
Diesel engine manufacturers know and publish very accurate fuel consumption
data. Competition keeps them honest.

Agreed & that's exactly why Yanmar "aren't" making this claim, some
seller & dreamers' magazine are.


A given engine in good tune will burn a given quantity of fuel at a given
load or power level. Load being a factor of speed vs weight generally.

Lot's of conditions contribute to load on a boat. Windage, bottom
condition, type of water, altitude, temperature, etc. That's why data is
generally published for a standard set of conditions.

Manufacturers sometimes have the benefit of testing fuel consumption for a
specific hull under varying conditions. They often publish the findings.
Boat builders often share the data if favorable to them. The potential
liability for publishing false data is sufficient to keep just about
everyone honest.

So now you're saying that the magazines don't actually "test" diesel???
OK progress at last!!! They certainly word their claims like they
already know they're suspect numbers, the infamous chuckster's "about"
gallons, in his world they must be huge, how many litres in a chuckster
gallon??? or gees louise I suppose there's chuckster litres there too??:-)

In my previous life I was a PM for the construction of a towboat. We opted
for large twin Cats. Cat predicted with very high accuracy exactly what
fuel consumption we would have with the engines.

Yes that's true & I'm well familiar with fuel consumption of marine
diesels that's why when just strolling past the thread I near fell over.

So now all you or anyone need do is find a proper Yanmar link which
claims anything like 315HP on 11 usgal/hr, I can't but hey Butch you
bought a Ficht so I'm sure you'll lead us all to one in a jiff.


Perhaps life in Oz is different.

I'll say it is!!! here that sort of BS marketing nonsense went out
years ago.

Any experienced diesel boat person would just giggle in their face, our
fuel is dearer than yours so .................. we bother to find out
the facts rather than rely upon spruikers claims, you should try it,
oops too late you already have the Ficht:-)

It's not my fault you lost so much money on the Ficht Butch, I'm just
the messenger. Besides yours seemed to keep working so you just lost
boat value; got off lighter than you deserve in my view:-)

K


Butch
"K. Smith" wrote in message
...

WaIIy wrote:

On Fri, 17 Dec 2004 19:39:51 +1100, "K. Smith" wrote:



I just looked at the Powerboat Reports Sept. 2004 issue where they
tested one
and
they saw 22 knot cruise at 7 gph. And a max speed of just a tick over 30
knots
and max gph of 12.

Well then post the link, I'll be most interested to see how they
verified the fuel consumption, particularly as they're saying they
"know" at cruise & max.

Absolute crap they're just parroting what the seller says & the seller
is .... well selling.

"If" these engines really do make 315HP (very, very, skeptical) then at
"max" that engine will be drinking a min of 18 usgal/hr but more likely
well over 20 gal/hr, if not then all the big diesel manufacturers have
been wasting their time & huge amounts of money trying to get lower fuel
usage, when all along the engine in their weekend bush basher was
getting better than their millions spent on improvements of 1 or 2 grams
per HP per hour.


PowerBoat reports does state this, but I don't think they installed
their own meters.

The charts in the article state the info is from Yanmar and True World
data.


Thanks Wally, so there ya go no actual knowledge of how much fuel the boat
burnt at various speeds etc.

Just accepted what the seller told them & of course given that a big part
of the marketing is super low fuel consumption .........

Thing is it's one thing for brand loyal owners to write fairy tale
testimonials, even the seller I guess will try to put the best spin
possible on every aspect of the boat, but the magazines claim to know & be
experienced in this stuff & they clearly aren't. By just repeating the
sellers marketing spruik they are part of a deception but to then try to
pretend they have checked the numbers?? well it seems they're knowingly
part of the marketing deception.

Those figures should have at the very least set alarm bells off, but they
haven't even checked???

Hmmmm curiouser & curiouser said Alice; hey!!!! "maybe" (NB maybe) they
did & it didn't come out even remotely close to claim (it wouldn't), then
of course the seller says yes yes sorry about that chief;-) dirty bottom,
wrong wind/sea state, full tanks, test boat you know think the prop copped
a knock, it's Wednesday, every & any excuse will be proffered all BS of
course but nudge nudge wink wink:-)




K.